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COATING R ,PLASTIC.

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' UNITED STATES PATENT OFFICE.

ISAAOP. WENDELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CHARLES P.TASKER, OF SAME PLACE.

COMPOSITION OF MATTER FOR USE AS INSULATING MATERIAL. r

SPECIFICATION forming part of Letters Patent No. 325,891, datedSeptember 8. 1885.

Application filed February 14, 1895. (No specimens.) l

. ,Z'o all whom it may concern: article are, two pounds of asbestus ortalc one :3. Be it known that I, ISAAC P. WENDELL, a pound of lithar eone-hmnmnticitizen of the United States, residing at Philamon an reepounds of ii uid silicm25 delphia, in the county of Philadelphia andso"('I' a or a corresponding aim 5 State of Pennsylvania, have inventeda new lized silicate of soda or a correspon 111g and useful Compositionof Matter, of which 5mlfit'di'(TEE 531Tivzilent indurating matethefollowing isaspecification. rial. These proportions may, however, be

The object of my invention is to provide an varied, and oxides orcombinations of lead 0 inexpensive compound having the proper other thanlitharge may be employed, without characteristics for use as aninsulating matedeparting from my invention.

rial. Having thus described my invention, I

My invention consists in a compound comclaimposed of asbestus or talc,litharge, antimony, Acomposition of matter consisting of asbcs- 3 5 andsilicate'of soda. Theasbestus,having first tus litharge, antimony, andsilicate of soda,

been reduced to acondition of fiber or powder, sdbstantially as setforth. I

or the tale to a condition of powder, is, with In testimonywhereof Ihavehereunto signed I litharge and antimony in the form of powder, my namethis 3d day of February, A. D. 1885.

well mixed with liquid silicate of soda, molded T into the desired formand dried by artificial ISAAC WELDELL- or natural heat. 1 In presenceof- The proportions of the materials above WM. 0. STRAWBRIDGE, namedwhich I have found to produce a good J. BONSALL TAYLOR.

